Move scroll paint property nodes to be owned by the transform tree

third_party/WebKit/Source/platform/graphics/paint/PaintChunker.cpp

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "platform/graphics/paint/PaintChunker.h"
 
 #include "platform/RuntimeEnabledFeatures.h"
 
 namespace blink {
 
@@ skipping 23 matching lines @@
 
 #if DCHECK_IS_ON()
   if (!gNullPaintPropertyChecksDisabled) {
     // Property nodes should never be null because they should either be set to
     // properties created by a LayoutObject/FrameView, or be set to a non-null
     // root node. If these DCHECKs are hit we are missing a call to update the
     // properties. See: ScopedPaintChunkProperties.
     DCHECK(m_currentProperties.propertyTreeState.transform());
     DCHECK(m_currentProperties.propertyTreeState.clip());
     DCHECK(m_currentProperties.propertyTreeState.effect());
-    DCHECK(m_currentProperties.propertyTreeState.scroll());
   }
 #endif
 
   ItemBehavior behavior;
   Optional<PaintChunk::Id> newChunkId;
   if (DisplayItem::isForeignLayerType(item.getType())) {
     behavior = RequiresSeparateChunk;
     // Use null chunkId if we are skipping cache, so that the chunk will not
     // match any old chunk and will be treated as brand new.
     if (!item.skippedCache())
@@ skipping 58 matching lines @@
 Vector<PaintChunk> PaintChunker::releasePaintChunks() {
   Vector<PaintChunk> chunks;
   chunks.swap(m_chunks);
   m_chunkBehavior.clear();
   m_currentChunkId = WTF::nullopt;
   m_currentProperties = PaintChunkProperties();
   return chunks;
 }
 
 }  // namespace blink